Nicotinamide riboside chloride

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ChemSpider 2D Image | Nicotinamide riboside | C11H15N2O5

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1-[(2R,3R,4S,5R)-3,4-dihydroxy-5-methylol-tetrahydrofuran-2-yl]pyridin-1-ium-3-carboxamide
CAS 1341-23-7 [RN]
3-(aminocarbonyl)-1-β-D-ribofuranosyl-Pyridinium

Nicotinamide riboside chloride

CAS 23111-00-4 CHLORIDE

CAS : 1341-23-7 (cation)   23111-00-4 (chloride)   445489-49-6 (Triflate)

3-Carbamoyl-1-((2r,3r,4s,5r)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)pyridin-1-ium chloride

Nicotinamide ribose chloride

UNII-8XM2XT8VWI

MW 290.7 g/mol

1-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]pyridin-1-ium-3-carboxamide;chloride

C1=CC(=C[N+](=C1)C2C(C(C(O2)CO)O)O)C(=O)N.[Cl-]

 Nicotinamide riboside; SRT647; SRT-647; SRT 647; Nicotinamide Riboside Triflate, α/β mixture

EH-301, nicotinamide riboside chloride,AND  pterostilbene,, BY Elysium Health Inc

Nicotinamide riboside, also known as NR and SRT647, is a pyridine-nucleoside form of vitamin B3 that functions as a precursor to nicotinamide adenine dinucleotide or NAD+. NR blocks degeneration of surgically severed dorsal root ganglion neurons ex vivo and protects against noise-induced hearing loss in living mice. Nicotinamide riboside prevents muscle, neural and melanocyte stem cell senescence. Increased muscular regeneration in mice has been observed after treatment with nicotinamide riboside, leading to speculation that it might improve regeneration of organs such as the liver, kidney, and heart. Nicotinamide riboside also lowers blood glucose and fatty liver in prediabetic and type 2 diabetic models while preventing the development of diabetic peripheral neuropathy. Note: Nicotinamide Riboside chloride is a α/β mixture

Nicotinamide riboside (NR) is a pyridine–nucleoside form of vitamin B3 that functions as a precursor to nicotinamide adenine dinucleotide or NAD+.[1][2]

Chemistry

While the molecular weight of nicotinamide riboside is 255.25 g/mol,[3] that of its chloride salt is 290.70 g/mol.[4][5] As such, 100 mg of nicotinamide riboside chloride provides 88 mg of nicotinamide riboside.

History

Nicotinamide riboside (NR) was first described in 1944 as a growth factor, termed Factor V, for Haemophilus influenza, a bacterium that lives in and depends on blood. Factor V, purified from blood, was shown to exist in three forms: NAD+, NMN and NR. NR was the compound that led to the most rapid growth of this bacterium.[6] Notably, H. influenza cannot grow on nicotinic acid, nicotinamide, tryptophan or aspartic acid, which were the previously known precursors of NAD+.[7]

In 2000, yeast Sir2 was shown to be an NAD+-dependent protein lysine deacetylase,[8] which led several research groups to probe yeast NAD+ metabolism for genes and enzymes that might regulate lifespan. Biosynthesis of NAD+ in yeast was thought to flow exclusively through NAMN (nicotinic acid mononucleotide).[9][10][11][12][13]

When NAD+ synthase (glutamine-hydrolysing) was deleted from yeast cells, NR permitted yeast cells to grow. Thus, these Dartmouth College investigators proceeded to clone yeast and human nicotinamide riboside kinases and demonstrate the conversion of NR to NMN by nicotinamide riboside kinases in vitro and in vivo. They also demonstrated that NR is a natural product found in cow’s milk.[14][15]

Properties

Although it is a form of vitamin B3, NR exhibits unique properties that distinguish it from the other B3 vitamins—niacin and nicotinamide. In a head-to-head experiment conducted on mice, each of these vitamins exhibited unique effects on the hepatic NAD+ metabolome with unique kinetics, and with NR as the form of B3 that produced the greatest increase in NAD+ at a single timepoint.[16]

Different biosynthetic pathways are responsible for converting the different B3 vitamins into NAD+. The enzyme nicotinamide phosphoribosyltransferase (Nampt) catalyzes the rate-limiting step of the two-step pathway converting nicotinamide to NAD+. Two nicotinamide riboside kinases (NRK1 and NRK2) convert NR to NAD+ via a pathway that does not require Nampt.[14]

Animal studies have demonstrated that these enzymes respond differently to age and stress. In a mouse model of dilated cardiomyopathy, NRK2 mRNA expression increased, while Nampt mRNA expression decreased.[17] A similar increase in NRK1 and NRK2 expression has been observed in injured central and peripheral neurons.[18][19][20][21][22]

Niacin is known for its tendency to cause an uncomfortable flushing of the skin. This flushing is triggered by the activation of the GPR109A G-protein coupled receptor. NR does not activate this receptor,[23] and has not been shown to cause flushing in humans—even at doses as high as 2,000 mg/day.[16][24][25][26]

Despite being an NAD+ precursor, nicotinamide acts as an inhibitor of the NAD+-consuming sirtuin enzymes.[10] When sirtuins consume NAD+, they create nicotinamide and O-acetyl-ADP-ribose as products of the deacetylation reaction. Consistent with high-dose nicotinamide as a sirtuin inhibitor, NR and niacin, but not nicotinamide, have been shown to increase hepatic levels of O-acetyl-ADP-ribose.[16]

Commercialization

In 2004, Dartmouth Medical School researcher Dr. Charles Brenner discovered that NR could be converted to NAD+ via the eukaryotic nicotinamide riboside kinase biosynthetic pathway[14] Dartmouth was subsequently issued patents for nutritional and therapeutic uses of NR, in 2006.[27] ChromaDex licensed these patents in July 2012, and began to develop a commercially viable, full-scale process to bring NR to market.[28]

Human Clinical Testing

There have been five published clinical trials on groups of both men and women testing for safety. One of these trials studied NR in combination with pterostilbene,[29] while the other four examined the effects of NR alone.[16][24][25][26]

The first published clinical trial established the safety and characterized the pharmacokinetics of single doses of NR.[16] Since then, doses as high as 2,000 mg/day have been administered over periods as long as 12 weeks.[25] These studies show that NR can significantly increase levels of NAD+ and some of its associated metabolites in both whole blood and peripheral blood mononuclear cells.[16][24][26]

In a 12 week clinical trial of obese insulin-resistant men using 2000 mg/day, NR appeared safe, but did not improve insulin sensitivity or whole-body glucose metabolism.[26] In a trial of NR 250 mg plus 50 mg of pterostilbene, as well as with double this dose, the combined supplement raised NAD+ levels in a trial of older adults.[29]

PATENT

WO-2019126482

https://patentscope.wipo.int/search/en/detail.jsf;jsessionid=E20C1C824C8C705AFA323203013A909F.wapp1nB?docId=WO2019126482&tab=PCTDESCRIPTION

Crystalline form of nicotinamide riboside chloride, useful for treating motor neuron disease or ALS, infertility, kidney damage, and liver damage or fatty liver. Elysium Health  in collaboration with  Mayo Clinic , is developing EH-301 (clinical, in July 2019), a combination of nicotinamide riboside chloride and pterostilbene for the treatment of amyotrophic lateral sclerosis. See WO2019108878 , claiming use of composition comprising nicotinamide riboside and pterostilbene, for treating obesity.

Nicotinamide riboside is a pyridine-nucleoside form of niacin ( i.e ., vitamin B3) that serves as a precursor to nicotinamide adenine dinucleotide (NAD+). NAD+promotes cellular metabolism, mitochondrial function, and energy production. Currently, nicotinamide riboside is made through synthetic methods or fermentation processes. Because of its significant potential to confer health benefits when used as a dietary supplement, there exists a need to develop highly efficient and scalable processes for the manufacture and purification of nicotinamide riboside.

SUMMARY OF THE INVENTION

In certain aspects, the present invention provides a crystalline form of a compound having the structure of formula (I)

Example 1. Scale-Up Synthesis and Crystallization of Nicotinamide Riboside Chloride

900 kg of nicotinamide riboside triacetate and 2133 kg of methanol were charged to a reactor and mixed, then cooled to 0 °C. 747 kg of 7M mmmonia in methanol (i.e.,“methanolic NH3”) was slowly charged to the reactor at 0 °C. The reaction mixture was passed through a polish filter, then the reaction mixture was stirred for 14 hours. A sample from the reaction mixture was taken to assess reaction progress. Upon completion of the reaction, the reaction mixture was

placed under vacuum, then warmed to 20 °C to 25 °C for 4 hours. Vacuum was applied until solids formed. Once solids were formed, the resultant slurry was filtered on a Nutsche filter dryer. Solids were washed with 1422 kg of ethanol, then 1422 kg of acetone, then 1322 kg of methyl tert butyl ether (MTBE). The resultant solids were then dried at 40 °C. Product was formed with 60% yield. The process flow diagram for this reaction is shown in FIG. 6.

Example 2. Optional Secondary Isolation

The crystalline form may optionally undergo a second isolation process according to the following steps: The solids obtained in Example 1 were dissolved in purified water at 30 °C to 40 °C. Ethanol was slowly added to the solution and mixed for 10 hours, over which time the solids began to precipitate. MTBE was then added and mixed for 2 hours. The mixture was then filtered on a Buchner funnel, and the solids were washed with ethanol, then acetone, then MTBE. Solids were dried at 40 °C.

Example 3. Spectroscopic Data.

The crystalline form made by the process described in Examples 1 and 2 has an XRD spectrum substantially as shown in FIG. 1. The instrument utilized in collecting the XRD data is a Rigaku Smart Lab X-Ray diffraction system.

Specifically, in order to collect the XRD data, The Rigaku Smart-Lab X-ray diffraction system was configured for reflection Bragg-Brentano geometry using a line source X-ray beam. The X-ray source is a Cu Long Fine Focus tube that was operated at 40 kV and 44 mA. That source provides an incident beam profile at the sample that changes from a narrow line at high angles to a broad rectangle at low angles. Beam conditioning slits are used on the line X-ray source to ensure that the maximum beam size is less than 10 mm both along the line and normal to the line. The Bragg-Brentano geometry is a para-focusing geometry controlled by passive divergence and receiving slits with the sample itself acting as the focusing component for the optics. The inherent resolution of Bragg-Brentano geometry is governed in part by the diffractometer radius and the width of the receiving slit used. Typically, the Rigaku Smart-Lab is operated to give peak widths of 0.1 °2Q or less. The axial divergence of the X-ray beam is controlled by 5.0-degree Sober slits in both the incident and diffracted beam paths.

The samples were prepared in a low background Si holder using light manual pressure to keep the sample surface flat and level with the reference surface of the sample holder. The single crystal Si low background holder has a small circular recess (10 mm diameter and about 0.2 mm depth) that held between 20 and 25 mg of the sample. The samples were analyzed from 2 to 40

°2Q using a continuous scan of 6 °20 per minute with an effective step size of 0.02 °20. The data collection procedure used to analyze these samples was not validated. The peak lists were generated using PDXL2 v.2.3.1.0. The figures were created using PlotMon VI.00.

PATENT

WO2019108878 , claiming use of composition comprising nicotinamide riboside and pterostilbene, for treating obesity.

CLIP

https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0186459

CLIP

Syntheses and chemical properties of β-nicotinamide riboside and its analogues and derivatives
  • February 2019
  • Beilstein Journal of Organic Chemistry 15(1):401-430
  • DOI: 10.3762/bjoc.15.36
 License, CC BY

Image result for Nicotinamide riboside chloride SYNTHESIS

References

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Further reading

ADDITIONAL INFORMATION

High dose nicotinic acid is used as an agent that elevates high-density lipoprotein cholesterol, lowers low-density lipoprotein cholesterol and lower free fatty acids through a mechanism that is not completely understood. It was suggested that nicotinamide riboside might possess such an activity by elevating NAD in the cells responsible for reverse cholesterol transport. The discovery that the Wallerian degeneration slow gene encodes a protein fusion with NMN adenylyltransferase 1 indicated that increased NAD+ precursor supplementation might oppose neurodegenerative processes.

ChromaDex acquired intellectual property on uses and synthesis of NR from Dartmouth College, Cornell University, and Washington University and began distributing NR as Niagen in 2013. In November 2015 ChromaDex received New Dietary Ingredient (NDI) status for Niagen from the U.S. Food and Drug Administration (FDA) and the FDA issued a generally recognized as safe (GRAS) No Objection Letter for Nicotinamide Riboside Chloride (NR) on August 3, 2016.

 

REFERENCES

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2: Bogan KL, Brenner C. Nicotinic acid, nicotinamide, and nicotinamide riboside: a molecular evaluation of NAD+ precursor vitamins in human nutrition. Annu Rev Nutr. 2008;28:115-30. doi: 10.1146/annurev.nutr.28.061807.155443. Review. PubMed PMID: 18429699.

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Nicotinamide riboside
Nicotinamide-beta-riboside.svg
Nicotinamideriboside.png
Names
Other names

1-(β-D-Ribofuranosyl)nicotinamide; N-Ribosylnicotinamide
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
KEGG
PubChem CID
Properties
C11H15N2O5+
Molar mass 255.25 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

///////////// EH-301,  EH 301,  EH301, Nicotinamide riboside,  SRT647, SRT-647, SRT 647, Nicotinamide Riboside Triflate, α/β mixture

C1=CC(=C[N+](=C1)C2C(C(C(O2)CO)O)O)C(=O)N.[Cl-]

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